22478539 has 8 divisors (see below), whose sum is σ = 25053840. Its totient is φ = 20042496.

The previous prime is 22478527. The next prime is 22478543. The reversal of 22478539 is 93587422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22478539 - 2⁵ = 22478507 is a prime.

It is a super-3 number, since 3×22478539³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22478569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34474 + ... + 35119.

It is an arithmetic number, because the mean of its divisors is an integer number (3131730).

Almost surely, 2^22478539 is an apocalyptic number.

22478539 is a deficient number, since it is larger than the sum of its proper divisors (2575301).

22478539 is a wasteful number, since it uses less digits than its factorization.

22478539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69629.

The product of its digits is 120960, while the sum is 40.

The square root of 22478539 is about 4741.1537625350. The cubic root of 22478539 is about 282.2210220038.

The spelling of 22478539 in words is "twenty-two million, four hundred seventy-eight thousand, five hundred thirty-nine".